/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *  
 *    http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License. 
 *  
 */

package org.apache.mina.protocol.dns.io.encoder;

import org.apache.mina.common.IoBuffer;
import org.apache.mina.protocol.dns.messages.QuestionRecord;
import org.apache.mina.protocol.dns.messages.RecordClass;
import org.apache.mina.protocol.dns.messages.RecordType;

/**
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 * @version $Rev: 84 $, $Date: 2008-02-22 16:33:48 +0000 (Fri, 22 Feb 2008) $
 */
public class QuestionRecordEncoder {
    /**
     * Encodes the {@link QuestionRecord} into the {@link IoBuffer}.
     *
     * @param out
     * @param question
     */
    public void put(IoBuffer out, QuestionRecord question) {
        encodeDomainName(out, question.getDomainName());
        encodeRecordType(out, question.getRecordType());
        encodeRecordClass(out, question.getRecordClass());
    }

    private void encodeDomainName(IoBuffer byteBuffer, String domainName) {
        String[] labels = domainName.split("\\.");

        for (String label : labels) {
            byteBuffer.put((byte) label.length());

            char[] characters = label.toCharArray();
            for (char character : characters) {
                byteBuffer.put((byte) character);
            }
        }

        byteBuffer.put((byte) 0x00);
    }

    private void encodeRecordType(IoBuffer byteBuffer, RecordType recordType) {
        byteBuffer.putShort(recordType.convert());
    }

    private void encodeRecordClass(IoBuffer byteBuffer, RecordClass recordClass) {
        byteBuffer.putShort(recordClass.convert());
    }
}
